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Title: Virial Expansion for a Strongly Correlated Fermi Gas

Abstract

Using a high temperature virial expansion, we present a controllable study of the thermodynamics of strongly correlated Fermi gases near the BEC-BCS crossover region. We propose a practical way to determine the expansion coefficients for both harmonically trapped and homogeneous cases, and calculate the third order coefficient b{sub 3}(T) at finite temperatures T. At resonance, a T-independent coefficient b{sub 3,{infinity}}{sup hom}{approx_equal}-0.290 952 95 is determined in free space. These results are compared with a recent thermodynamic measurement of {sup 6}Li atoms, at temperatures below the degeneracy temperature, and with Monte Carlo simulations.

Authors:
 [1];  [1];  [1]
  1. ARC Centre of Excellence for Quantum-Atom Optics, Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122 (Australia)
Publication Date:
OSTI Identifier:
21316626
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 102; Journal Issue: 16; Other Information: DOI: 10.1103/PhysRevLett.102.160401; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPUTERIZED SIMULATION; EXPANSION; FERMI GAS; LITHIUM 6; MONTE CARLO METHOD; RESONANCE; THERMODYNAMICS

Citation Formats

Xiaji, Liu, Department of Physics, University of Queensland, Brisbane, Queensland 4072, Hui, Hu, Department of Physics, University of Queensland, Brisbane, Queensland 4072, Department of Physics, Renmin University of China, Beijing 100872, and Drummond, Peter D. Virial Expansion for a Strongly Correlated Fermi Gas. United States: N. p., 2009. Web. doi:10.1103/PHYSREVLETT.102.160401.
Xiaji, Liu, Department of Physics, University of Queensland, Brisbane, Queensland 4072, Hui, Hu, Department of Physics, University of Queensland, Brisbane, Queensland 4072, Department of Physics, Renmin University of China, Beijing 100872, & Drummond, Peter D. Virial Expansion for a Strongly Correlated Fermi Gas. United States. https://doi.org/10.1103/PHYSREVLETT.102.160401
Xiaji, Liu, Department of Physics, University of Queensland, Brisbane, Queensland 4072, Hui, Hu, Department of Physics, University of Queensland, Brisbane, Queensland 4072, Department of Physics, Renmin University of China, Beijing 100872, and Drummond, Peter D. Fri . "Virial Expansion for a Strongly Correlated Fermi Gas". United States. https://doi.org/10.1103/PHYSREVLETT.102.160401.
@article{osti_21316626,
title = {Virial Expansion for a Strongly Correlated Fermi Gas},
author = {Xiaji, Liu and Department of Physics, University of Queensland, Brisbane, Queensland 4072 and Hui, Hu and Department of Physics, University of Queensland, Brisbane, Queensland 4072 and Department of Physics, Renmin University of China, Beijing 100872 and Drummond, Peter D},
abstractNote = {Using a high temperature virial expansion, we present a controllable study of the thermodynamics of strongly correlated Fermi gases near the BEC-BCS crossover region. We propose a practical way to determine the expansion coefficients for both harmonically trapped and homogeneous cases, and calculate the third order coefficient b{sub 3}(T) at finite temperatures T. At resonance, a T-independent coefficient b{sub 3,{infinity}}{sup hom}{approx_equal}-0.290 952 95 is determined in free space. These results are compared with a recent thermodynamic measurement of {sup 6}Li atoms, at temperatures below the degeneracy temperature, and with Monte Carlo simulations.},
doi = {10.1103/PHYSREVLETT.102.160401},
url = {https://www.osti.gov/biblio/21316626}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 16,
volume = 102,
place = {United States},
year = {2009},
month = {4}
}